1、BRITISH STANDARD BS EN 50305:2002 Railway applications Railway rolling stock cables having special fire performance Test methods The European Standard EN 50305:2002 has the status of a British Standard ICS 13.220.20; 29.060.20; 45.060.01 BS EN 50305:2002 This British Standard, having been prepared u
2、nder the direction of the Electrotechnical Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 9 August 2002 BSI 9 August 2002 ISBN 0 580 40243 6 National foreword This British Standard is the official English language version of
3、EN 50305:2002. The UK participation in its preparation was entrusted by Technical Committee GEL/20, Electric cables, to Subcommittee GEL/20/12, Railway cables, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross
4、-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of B
5、ritish Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; pre
6、sent to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an
7、 inside front cover, the EN title page, pages 2 to 38, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEAN STANDARD EN 50305 NORME EUROPENNE EUROPISCHE
8、 NORM July 2002 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2002 CENELEC - All rights of exploitation in any form and by any
9、 means reserved worldwide for CENELEC members. Ref. No. EN 50305:2002 E ICS 13.220.20; 29.060.20; 45.060.01 English version Railway applications - Railway rolling stock cables having special fire performance - Test methods Applications ferroviaires - Cbles pour matriel roulant ferroviaire ayant des
10、performances particulires de comportement au feu - Mthodes dessais Bahnanwendungen - Kabel und Leitungen fr Schienenfahrzeuge mit verbessertem Verhalten im Brandfall - Prfverfahren This European Standard was approved by CENELEC on 2002-07-02. CENELEC members are bound to comply with the CEN/CENELEC
11、Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENEL
12、EC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions.
13、CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom.EN 50305:2002 2 For
14、eword This European Standard was prepared for the Technical Committee CENELEC TC 20, Electric cables by WG 12, Railway cables, on behalf of the Technical Committee CENELEC TC 9X, Electrical and electronic applications for railways. The text of the draft was submitted to the Unique Acceptance Procedu
15、re and was approved by CENELEC as EN 50305 on 2002-07-02. The following dates were fixed: - latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2003-07-01 - latest date by which the national standards conflictin
16、g with the EN have to be withdrawn (dow) 2008-07-01 Annexes designated “normative“ are part of the body of the standard. Annexes designated “informative“ are given for information only. In this standard, annexes B and E are normative and annexes A, C and D are informative. _ 3 EN 50305:2002 Contents
17、 Introduction5 1 Scope.6 2 Normative references6 3 Definitions7 4 Applicability, sampling, test-piece preparation and test conditions.7 4.1 Applicable tests7 4.2 Classification of tests .7 4.3 Sampling7 4.4 Test-piece preparation .7 4.5 Test conditions.7 5 Mechanical tests8 5.1 Impact test at low te
18、mperature .8 5.2 Abrasion resistance8 5.3 Notch propagation9 5.4 Pliability .10 5.5 Strippability and adhesion of insulation.11 5.6 Dynamic cut-through11 6 Electrical tests.12 6.1 Electrical resistance of conductors .12 6.2 Voltage test on completed cable.12 6.3 Voltage test on sheath12 6.4 Insulati
19、on resistance 13 6.5 Spark test 13 6.6 Surface resistance .14 6.7 D.C. stability 14 6.8 Dielectric strength 15 7 Ageing and thermal tests15 7.1 Compatibility 15 7.2 Long term ageing for insulation .15 7.3 Long term ageing for sheath.19 7.4 Ozone resistance .19 7.5 Pressure test at high temperature 2
20、1 7.6 Shrinkage test for insulation .21 7.7 Stress cracking test21 8 Tests in fluids, including water.23 8.1 Mineral and fuel oil resistance 23 8.2 Acid and alkali resistance.23 8.3 Water absorption of sheath 23 9 Reaction to fire tests .24 9.1 Flame propagation .24 9.2 Toxicity 24 10 Miscellaneous
21、tests.27 10.1 Durability of marking 27 10.2 Blocking of cores27EN 50305:2002 4 Annex A (informative) List of other test methods applicable to rolling stock cables .29 Annex B (normative) Procedure for checking the efficacy of the method of spark testing (with reference to 6.5) 30 Annex C (informativ
22、e) Long term ageing test Significance and use.32 Annex D (informative) Illustration of an Arrhenius plot33 Annex E (normative) Analysis methods for toxicity .34 Figure 1 Test arrangement for abrasion of insulation and sheath .9 Figure 2 Pliability test rig .10 Figure 3 Assembly for adhesion test11 F
23、igure 4 Arrangement of electrodes for test sample.14 Figure 5 Suggested method of attachment of insulated wire test specimen to mandrel 18 Figure 6 Clamping device20 Figure 7 Flat topped cone .22 Figure 8 Schematic diagram of apparatus for production, collection and analysis of gases.26 Figure B.1 R
24、emoval of insulation segment.30 Figure B.2 Overlap position for tape 31 Table 1 Tolerances for temperature values7 Table 2 Parameters for impact test at low temperature8 Table 3 Recommended exposure times in days per cycle.17 Table 4 Requirements for wrapping test .17 Table 5 Determination method to
25、 be applied 25 Table 6 CC z values for various gases .27 5 EN 50305:2002 Introduction The railway industry is generally concerned with the movement of people as well as goods. It is therefore essential that a high level of safety is achieved, even when failures occur which may involve fire, howsoeve
26、r caused, affecting railway rolling stock. Hence it is necessary to provide cables for use in railway environments which minimise the hazard to people when a fire may damage the cable, irrespective of whether the fire is caused by an external source or from within the electrical system. European Sta
27、ndards EN 50264 and EN 50306 specify cables which, in the event of fire will limit risk to people and improve the safety on railways in general. They cover cables based on halogen free materials, for use in railway rolling stock. EN 50264 covers a range of sheathed and unsheathed cables, with standa
28、rd wall thickness of insulation, rated at up to 3,6/6 kV with conductor sizes 1,0 mm 2up to 400 mm 2 . EN 50306 covers a range of sheathed and unsheathed cables with thin wall insulation, and restricted to a rating of 300 V to earth and a maximum conductor size of 2,5 mm 2 . This standard EN 50305,
29、gives particular test methods applicable to the cables at present covered by EN 50264 and EN 50306.EN 50305:2002 6 1 Scope This standard specifies special test methods applicable to cables, and their constituent insulating and sheathing materials, for use in railway rolling stock. Such cables are sp
30、ecified in the various parts of EN 50264 and EN 50306. Other test methods required for railway rolling stock cables and their insulating and sheathing materials are listed in Annex A. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publ
31、ications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revisi
32、on. For undated references the latest edition of the publication referred to applies (including amendments). EN 50264-1 Railway applications - Railway rolling stock cables having special fire performance - Standard wall - Part 1: General requirements EN 50266-2-4:2001 Common test methods for cables
33、under fire conditions - Test for vertical flame spread of vertically-mounted bunched wires or cables - Part 2-4: Procedures - Category C EN 50267-1 Common test methods for cables under fire conditions Test on gases evolved during combustion of materials from cables - Part 1: Apparatus EN 50306-1 Rai
34、lway applications - Railway rolling stock cables having special fire performance - Thin wall - Part 1: General requirements EN 60216-1 Electrical insulating materials - Properties of thermal endurance - Part 1: Ageing procedures and evaluation of test results (IEC 60216-1) EN 60811-1-1 Insulating an
35、d sheathing materials of electric cables - Common test methods - Part 1-1: General application - Measurement of thickness and overall dimensions - Tests for determining the mechanical properties (IEC 60811-1-1) EN 60811-1-2 Insulating and sheathing materials of electric cables - Common test methods
36、- Part 1-2: General application - Thermal ageing methods (IEC 60811-1-2) EN 60811-1-3 Insulating and sheathing materials of electric cables - Common test methods - Part 1-3: General application - Methods for determining the density - Water absorption tests - Shrinkage test (IEC 60811-1-3) EN 60811-1
37、-4 Insulating and sheathing materials of electric cables - Common test methods - Part 1-4: General application - Test at low temperature (IEC 60811-1-4) EN 60811-3-1 Insulating and sheathing materials of electric cables - Common test methods - Part 3-1: Methods specific to PVC compounds - Pressure t
38、est at high temperature - Tests for resistance to cracking (IEC 60811-3-1) ISO 6349 Gas analysis - Preparation of calibration gas mixtures - Permeation method ISO 8458-2 Steel wire for mechanical springs - Part 2: Cold-drawn carbon steel wire 7 EN 50305:2002 3 Definitions The definitions given in EN
39、 50264-1 and EN 50306-1, shall apply to this standard. 4 Applicability, sampling, test-piece preparation and test conditions 4.1 Applicable tests Tests applicable to each type of cable are given in the particular cable standard. 4.2 Classification of tests The classification of tests is given in the
40、 general requirements of the relevant cable standard. 4.3 Sampling The size and number of samples for each particular test is given either in this EN or the relevant cable standard. 4.4 Test-piece preparationThe preparation of test pieces shall be as described in the particular test method or in the
41、 cable standard.NOTE Attention is drawn to the fact that some insulation systems used for railway cables are composites (multilayer). In such cases special preparation techniques and requirements are given in the particular cable standard. 4.5 Test conditions 4.5.1 Ambient temperature Tests shall be
42、 made at an ambient temperature within the range 5 C to 35 C, unless otherwise specified in the details for the particular test. 4.5.2 Tolerance on temperature values The tolerances which shall apply to the temperature values are given in Table 1. Table 1 Tolerances for temperature values Specified
43、temperature (T) Tolerance C C -40 T 0 2 0 150 3 4.5.3 Frequency and waveform of power frequency test voltages Unless otherwise specified, the test voltage shall be a.c. 49 Hz to 61 Hz of approximately sine-wave form; the ratio peak value/r.m.s. value being equal to 2 with a tolerance of 7 %. The val
44、ues quoted are r.m.s. values.EN 50305:2002 8 4.5.4 Pre-conditioning Unless otherwise stated the tests shall be carried out not less than 16 h after the extrusion or cross- linking, if any, of the insulating or sheathing compounds. 5 Mechanical tests 5.1 Impact test at low temperature The impact test
45、 in accordance with 8.5 of EN 60811-1-4 shall be used except that the mass of hammer, intermediate test piece and height of drop shall be as given in Table 2. Table 2 Parameters for impact test at low temperature Cable diameter (D) Mass of hammer Mass of intermediate test piece Height of drop mm g g
46、 mm D 15 1 000 200 100 15 25 2 000 200 200 The inside and outside of the sheath and the insulation of unsheathed cables shall then be examined with normal or corrected vision, without magnification. The insulation of sheathed cables shall be examined on the outside only. 5.2 Abrasion resistance The
47、test shall be carried out at a temperature of (20 5) C, using a machine similar to that shown in Figure 1. The cutting edge shall be either a polished steel spring wire needle of (0,45 0,01) mm diameter, and of material according to ISO 8458-2, held in a suitable support (Figure 1 b), or a rectangul
48、ar shaped steel blade (Figure 1 a) mounted at 90 to the axis of the cable. The setting shall be arranged so as to wear the surface of the core or cable lengthwise over a distance of 10 mm to 20 mm, with a frequency of (55 5) cycles per minute. The machine shall be fitted with a counter which shall s
49、top automatically when the cutting edge touches the conductor or electrical screen. For cables of diameter less than or equal to 6 mm the needle shall be used, and for cables with diameter greater than 6 mm the steel blade shall be used, unless otherwise specified in the particular cable standard. The load on the cutting edge shall be defined in the cable standard. The test specimen
